Summary: At present the energy-saving problem of air-blower of sewage treatment plant already was taken seriously generally of people, computer room of blast of plant of sewage of village of discipline of city of article union Tianjin is transformed, east design of computer room of blast of outskirt sewage plant and project of sewage disposal of seamless tubing mill, from assure to safety moves and improve the square interview such as working environment when to design experience.
Keyword: Sewage treatment plant, air-blower room, design experience
1Asthma brace up reach prevent a method
1.1 asthma brace up
In fan movement process, reduce Q ceaselessly when dischargeMinWhen the value, the air current that enters foliaceous bar produces depart, rotate in order to compare impeller along impeller direction of rotation in separate division the rate with minor angular velocity is floating, this rotates namely break away from. Should rotate break away from diffuse whole passageway, can make fan outlet pressure drops suddenly substantially, and force of middling pressure tubal a net not the bring down on the horse, the aeriform pressure in be in charge of a net then is more than the pressure of fan exit, the gas in be in charge of a net flows to fan, drop till the pressure in be in charge of a net come to just stop under air-blower outlet pressure. Then, air-blower begins again to air feed tubal a net, go to refluent aeriform extrude, this makes the discharge inside machine decreases again, pressure drops suddenly again, the gas in be in charge of a net flows backwards afresh to fan inside, such go round and round, the pressure that produces periodic low frequency tall amplitude in whole system is pulsatile reach phenomenon of air current oscillation, give out very big noise, the machine produces acuteness vibration, down to misfires, this breathes heavily namely brace up.
From theoretic still cannot calculate correctly an asthma brace up operating mode dot, can be judged only when function checks according to experience whether to enter asthma brace up operating mode.
① listens the air current noise that measures fan to give tracheal path. Be close to asthma brace up when operating mode, give the noise discretion that the air current in tracheal path gives out, produce periodic change. Should enter asthma brace up when operating mode, noise instantly leap, even sonic boom appears.
Outlet pressure of ② observation fan and entrance discharge change. Its outlet pressure and entrance discharge change when regular job not quite, should enter asthma brace up zone time, the change of both is very big.
The oscillatory circumstance of ③ observation airframe. Enter asthma brace up zone time, airframe and bearing can produce intense vibration.
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